Determination of trace copper(II) by Triton X-100 sensitized fluorescence quenching of a novel calix [4]arene Schiff base derivative

作者：Yang Qian; Zhu Xiashi^*; Yan Chaoguo; Sun Jing

来源：Analytical Methods, 2014, 6(2): 575-580.

DOI：10.1039/c3ay41177j

Fluorescence quenching by copper(II) of a Schiff base derivative of p-tert-butylcalix[4] arene (SANCAX) in 0.1% polyethylene glycol tert-octylphenyl ether (Triton X-100) medium was investigated. The fluorescence of SANCAX is quenched by Cu2+ due to the formation of a weaker fluorescent inclusion complex (Cu-SANCAX). The fluorescence quenching (Delta F = F-SANCAX - FCu-SANCAX) is sensitized in Triton X-100. Under optimal conditions, the linear range calibration curve for the determination of Cu2+ is 0.005-0.08 mu g mL(-1). The detection limit is 3.05 ng mL(-1) with an RSD of 1.55% (n = 3, c = 0.05 mg mL(-1)). The SANCAX fluorescence quenching mechanism was investigated by the Benesi-Hildebrand method, fluorescence quantum yield, and IR. The method has been applied in the determination of trace Cu2+ in real samples with satisfactory results.

• 出版日期2014
• 单位扬州大学